Official. I hate the northern line. I did not realise it was possible to hate non sentient objects. On the plus side I have just completed 30 min walk to nearest Thames link station. Thankfully Thames link trains are very reliable. trains……….. pic.twitter.com/YQ5XTVhiiC

Brian Woodhead, London Underground’s director of customer service, said: “I am extremely sorry for the disruption suffered by customers on the Northern line today following a signalling system failure at our control centre.

“Our engineers are working hard to fix the problem and restore a full service as quickly as possible.”